Stapling machine



FIG. 1 is a right side perspective view of the stapling machine according to the present design;

FIG. 2 is a left side perspective view;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view;

FIG. 5 is left side elevation view, the right side being a mirror image thereof;

FIG. 6 is a front elevation view; and,

FIG. 7 is a rear elevation view. 

The ornamental design for stapling machine, as shown and described. 